<div class="container post-detail-main-container">
    <div class="row">
        <div class="col-md-9">
            <app-post-detail></app-post-detail>
            <app-sign-in></app-sign-in>
            <app-comment-list></app-comment-list>
        </div>
        <div class="col-md-3">
            <app-user-info></app-user-info> 
        </div>
    </div>
</div>
